the pipel is the oberkapo's servant. The pipel died by hanging. The oberkapo was a giant ducth guy who wasn't mean towards his workers. The oberkapo was suspected of destroying a factory and was tortured and was killed in Auswitz.
Akiba Drumer is a parallel for Eliezer. Both suffer horribly, both find their faiths tested, and both ultimately lose their ability to believe as they once did. Wiesel needs him in the book to underscore the terrible nature of that loss, to help us understand what it means to have one's faith ripped away. Akiba is a very human human, if that makes any sense; he seems kind, caring, etc., and when the Germans' brutality strips those human elements away from him, we're moved more deeply than if Akiba had simply been a "normal" person.
One difference, however, is that Akiba perishes, while Eliezer survives. Akiba's selection makes sense - he's older and weaker - but Elie should have been selected as well. He avoids selection by repeatedly lying and dodging, by pretending to be older than he is, by transforming into something other than himself - A-7713 instead of Eliezer Wiesel. All that survival cost him was everything he once used to define himself.
Admittedly, I'm not the best figure to consult regarding the difference between the Talmud and the Cabbala. My understanding has always been that the Talmud, in bound written form, represents "mainstream" Jewish thought and teachings, whereas the Cabbala pertains to Jewish mysticism. If someone has a better or more complete definition, please feel free to add it to my own.
What do the shoes and gold crown represent? Does it represent Elie's last own possesions, valuables or something?